1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51dc81caaa5bc8c695d668ba9bb79b25f86f7e3b36ac0863be02616bba68b30. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99d8c7a7-a412-4f30-b51b-ab9d5ecd4ddc.json and https://artists.proofprofile.net/proofs/artist/99d8c7a7-a412-4f30-b51b-ab9d5ecd4ddc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7747037cc0a4e0bf77b5d0d32eaa9cce2dafae6abb2e947cffee593603946a6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fd6205f5733be5f6fae880c6d91063ada046c564a674b0862863eb89c5d4aa. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0773c41555764202e00fe22eec4c43789c9cb0c5338d1f55bcbb404276247274. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba7a4865d4f4d9535454908e8527755f30bed6eb2c0955cae6cab8697582200. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6504a037590bb1f50bc4c0fd205302d3010114ca6bb14062d11e38a8a9a7ece1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88df5a1685bf4f37123cab87c52e6a191b7a9a020ec7176e6da19d932f1ec2c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa079da75eb3aac0f82e1b1bedf4752e86fa8c9698656b8fe22c7c3ff43b230ef. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd18c23c47caca31d352c3817bd3834145a3d4195df89d7ef09bd22af04ec34d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba48950c85b830e6b1d6950fa8f986b92cda7a5abc7c71bb329596d899dbdfc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40459348b6d2276722640fbf0d4d67b6010512478556f867fbbbc3c040f0e868. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c8e0b309876ad0dbe28b1041d0680c53c7e282e3c4ac00cdeee61c382b80e7. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6de1904cc5fa82dd8b986c141ad90cb833bda87c8ca5b559ef599a331ad490. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320d9d32beb80cd54d47d6c5dd85f834ad20327de79bd3f502afa3c9df770d8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD1V2300004.